Measurement probe for measuring pressure inside air duct and measurement system for measuring pressure difference
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Solution Overview
Problem
Traditional air pressure measurement units in air ducts struggle to accurately measure pressure near flow disturbances, such as duct turns or air dampers, due to insufficient measurement pressure and are often bulky to avoid interference, making it difficult to control air flow effectively.
Innovation Solution
A measurement probe with a wall extending from the top surface to the bottom surface, featuring a hole connected to an air channel and pressure sensor, is designed to be installed near air flow disturbances, enhancing pressure difference measurement and protection from flow disturbances by positioning the wall in various orientations relative to the hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional pressure sensors are placed near flow disturbances to measure pressure, then measurement precision is improved, but the measurements become unreliable due to flow disturbance interference
Solution Approach 1:
A wall structure is introduced as an intermediary element between the measurement hole and the flow disturbance. This wall acts as a mediator that blocks direct exposure to turbulent flow while still allowing pressure transmission through the hole, thus protecting the measurement from disturbances while maintaining measurement capability
Solution Approach 2:
The measurement approach transitions from direct exposure in the flow field to a protected configuration where the wall creates a new spatial dimension. The hole is positioned on the wall surface rather than directly in the flow path, utilizing the wall's thickness and surface as an additional dimensional space for reliable measurement
2Reliability
If safety distance is increased after flow disturbances to ensure reliable measurement, then measurement reliability is improved, but the device complexity and space requirements increase
Solution Approach 1:
The harmful effect of flow disturbance is extracted and isolated from the measurement point by positioning the hole on the wall surface. This separates the measurement function from the disturbed flow region, eliminating the need for large safety distances while maintaining measurement reliability
Solution Approach 2:
The wall structure provides localized protection at the measurement point without requiring extensive space. The protection is concentrated where needed (at the hole location on the wall) rather than requiring a large clear zone, thus reducing overall device complexity and space requirements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for more reliable measurement of airflow pressure characteristics near disturbances, improving air flow control by providing enhanced pressure data and reducing the need for excessive space, thus enabling more precise adjustment of air flow volumes.
Implementation Method 1
a measurement point comprising a hole extending from the top surface to the bottom surface. The hole is arranged to be connected to an air channel and further to a pressure sensor
Data Source
AI summary
A measurement probe for measuring air pressure inside an air duct, which measurement probe is arranged to be installed to a wall of a damper having at least one damper blade or to a wall of an air duct in which the damper is installed, wherein the measurement probe comprises:a top surface and a bottom surface, anda measurement point comprising a hole extending from the top surface to the bottom surface, which hole is arranged to be connected to an air channel and further to a pressure sensor. The measurement probe comprises a wall next to the hole, wherein the wall extends from the top surface.